docs: def create_lambda_function(self):
          """Create or update Lambda function."""
          vpc_config = self._vpc_config()
  
          if self._check_lambda():
              self.update_function_configuration(vpc_config)
          else:
              self.create_function(vpc_config)
  
          if self._check_lambda_alias():
              self.update_alias()
          else:
              self.create_alias()